Baer Heli Coil Tap - Wire Thread Insert - Bottoming Tap (STI) - UNC - 1.1/8 x 7 is a precision-tuned tapping solution designed to deliver durable, repair-ready threads for HeliCoil inserts and a wide range of metal applications. Built for professional-grade reliability, this tool helps you reinforce damaged holes and create rock-solid threads that resist wear and vibration.

Crafted from high-quality tooling material and finished for longevity, the Baer Heli Coil Tap features bottoming geometry that reaches the full thread depth in blind holes. That means consistent engagement for every HeliCoil insert, reduced thread play, and longer service life for critical components—from engines to chassis and industrial equipment.

Key advantages

• Bottoming design ensures full thread depth to the bottom of the hole for maximum grip and insert performance.
• UNC 1-1/8 x 7 provides a robust, common thread standard suitable for many repair and reinforcement tasks.
• HSS-G construction delivers dependable hardness and wear resistance for repeated use in demanding workshop environments.
• Designed for wire thread inserts to reliably create clean, precise threads that house HeliCoil inserts with minimal fuss.
• Versatile for multiple metals—ideal for steel, cast iron, aluminum, and other common substrates encountered in maintenance and repair projects.

Who this is for

Perfect for professional machinists, automotive technicians, and serious DIY enthusiasts who refurbish worn threads, repair stripped holes, or reinforce critical components with HeliCoil inserts. If you routinely service engines, transmissions, machinery housings, or chassis components, this bottoming tap delivers repeatable, dependable results.

Use cases and scenarios

• Repairing stripped threads in engine blocks or cylinder heads and preparing holes for HeliCoil inserts.
• Reinforcing threaded holes in chassis components that endure vibration and loading.
• Maintenance on industrial equipment where durable, long-lasting threads are essential for reliability.

How to get the best results

Pair the Baer Heli Coil Tap with appropriate cutting fluid and the matching HeliCoil insert kit. Secure the workpiece, align the tap precisely with the hole, and apply steady pressure to cut clean, burr-free threads. After tapping, inspect the threads for any debris, chase if needed, and then install the wire thread insert for a durable repair ready to handle repeated fastener cycles.

The images show the tool from multiple angles, highlighting its solid build and practical design for everyday use in professional and home garages alike.